Celestica (TSX:CLS) Stock Asks Whether Record Margins Can Sustain AI Growth

Celestica stock came into today sitting near record territory at CA$492.14 after a modest 7‑day gain and slightly softer 90‑day stretch. The earnings print that hit the tape was all about power in the profit engine, not just the share price ticker. Q2 revenue reached US$4.70b with adjusted operating margin at 8.2%, a company high, and adjusted earnings per share landed at US$2.54.

For a contract electronics manufacturer, that kind of margin profile is the real story. The key question from here is how long that earnings quality can hold as the multiyear AI and networking buildout continues.

Is Celestica’s 36x P/E, with a share price above the supplied DCF estimate, signaling justified growth expectations or stretched optimism in TSX:CLS? Compare the current market pricing against the full valuation analysis for Celestica

Q2 2026 Earnings Summary

• Revenue, Q2 2026 vs. Q2 2025: US$4,698.6m vs. US$2,893.4m (very large increase)
• Net Income, Q2 2026 vs. Q2 2025: US$368.8m vs. US$211.0m (up 74.8%)
• Basic EPS, Q2 2026 vs. Q2 2025: US$3.21 vs. US$1.83 (up 74.9%)
• Adjusted Operating Margin, Q2 2026 vs. Q2 2025: 8.2% compared with the prior period company level (company high in the latest quarter)

Tired of scrolling through paragraphs of earnings commentary and raw figures on Celestica? Get a clear visual read on how the stock’s valuation, earnings profile and key trends fit together in the full company report for Celestica.

Celestica bull case: AI engine hitting key milestones

Bulls argue Celestica is becoming a core AI and cloud hardware partner with rising earnings quality. Q2 goes a long way to support that. CCS reached 81% of revenue at US$3.81b and Hyperscaler Switching hit US$1.9b and 41% of total revenue, which lines up with the idea that hyperscaler programs are now the main engine. Enterprise revenue tied to AI and storage grew very quickly, which fits the narrative of deeper design wins and larger rack level engagements. At the same time, adjusted operating margin reached 8.2% and both CCS and ATS margins improved, which backs the shift toward higher value systems and services. Free cash flow of US$147m in Q2 and US$285m year to date, alongside low leverage of about 0.5x adjusted EBITDA, supports the claim that Celestica can fund heavy AI led capacity build outs while keeping the balance sheet in check.

Bear case: concentration, cash strain and stretch risks

Bears focus on heavy hyperscaler dependence, thin free cash flow against large capex and the risk that AI driven ramps prove hard to sustain. Q2 confirms that concentration is high. CCS is 81% of revenue and three hyperscalers account for a large share of that, so any order pause would hit hard. Investment intensity is also clearly on the high side. CapEx was US$264m in Q2 and management still plans about US$1.0b for 2026 and a US$1.5b placeholder for 2027, which keeps free cash flow relatively modest versus earnings. Inventory increased to US$3.4b to support ramps, which ties more cash to working capital and adds execution risk if program timing slips. Management again highlighted component supply as the main constraint, so the bear worry about supply chain and large, complex 2027 ramps remains very much alive.

Scan Celestica’s concentration, capex and earnings quality for early warning signals that might not be obvious on the surface in the full risk analysis for Celestica which shows 1 important warning sign.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.

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